Movable support for threshing-machine concaves.



O. OLSON.

MOVABLE SUPPORT FOR THRESHING MACHINE GONGAVES.

APPLICATION FILED APR. 23, 1908.

906,553. Patented Dec. 15, 1908 3 SHEETS-SHEET 1.

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MOVABLE SUPPORT FOR THRESHING MACHINE GONUAVES.

APPLICATION FILED APR. 23, 1908. v

Patented Dec. 15, 1908 3 SHEETSSHEET 2.

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O. OLSON.

MOVABLE SUPPORT FOR THEESHING MACHINE OONOAVES.

APPLICATION FILED APR. 2a, 1908.

Patented Dec. 15, 1908.

3 SKEETSBHEET 3.

OLAUS OLSON. OF OLARISSA, MINNESOTA.

movannn sorrow Foe THREsnme-Macnms conoevne.

Specification of Letters Patent.

Patented Dec. 15, 1.90

Application filed April 23, 1908. Serial No. 428:745.

To all whom it may concern:

Be-it known that I, OLAUS Orson, a citizen of the United States,residingat Clarissa, in the county of Todd and State of Minnesota,

have invented certain new and useful Improvements in MovableiSupportsfor Threshlug-Machine Concaves; and I do hereby declare the. followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

My invention relates to threshing in achines and has for its object toprovide a simple and eflicient device for supporting the concave Fmovably in respect to the threshing cylinder and in such manner that theconcave may be readily moved into an inoperative position where readyaccess may be had thereto for the purpose of repair or adjustments ofthe parts.

To the above ends the invention consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.

The invention is illustrated in the accouu )anying drawings, whereinlike characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view in side elevation withsome parts broken away, illustrating my invention applied to an ordinarythreshing machine and showing the concavemoved into an inoperativeposition outside of the case of the machine. Fig. 2 is an elevation,with parts broken away, looking at the receiving end of the-threshingmachine and showing my invention applied thereto; and Fig. 3 is a vertical longitudinal section taken on the line 00 r of Fig. 2, showing theconcave supported in an operative position.

Of the parts of the threshing machine, the numeral 1 indicates, as anentirety, the case of the thmshing machine and the numeral 2 indicatesithe toothed threshing cylinder, which parts may be of the usualconstruction. The toothed concave which cooperates with the said toothedcylinder is shown of suhstantially the standard'consrruction, being madeup of a multiplicity of toothed bars 3 that'are detachably seated in asegmental groove 4 etc pair of curved end brackets 5.

11 carrying out my invention, the lower ends of these end brackets 5 arepreferably 'ivoted t0 bearings 6 that are bolted or ot erwise therebyholding the said rack bars against rigidl secured each to one of a pairof long; paral el rack bars 7.

The rack bars 7, at their under edges, provided with intermediatelylocated tee that engage spur pinions 8 rigidly secured to acounter-shaft 9 mounted in suitable bear-- ings 10 on the frame-work ofthe casing The pinions'S have projecting hub portic and the rack bars 7have depending side flanges that embrace said pinions and en- (3 gagetheir said hubs, as best shown in Fig. 1 3,

lateral movement in respect to said pinic The teeth of the rack bars 7extend appro mately from their outer to their central por tions, andtheir reduced inner portions a e arranged to run between pairs oiantiiriction guide rollers 11 mounted in bearing brackets 12 suitablysecured to the machine case 1. At the extreme inner ends of the bars 7are stop lugs 7 that prevent the said bars from being moved outwardentirely from between the cooperating rollers 11, as best shown in Fig.l. The counter-shaft? is provided, at one end, with an operating crank9%}, by means of which it may be rotated to impart cndwise travelingmovements to the rack bars 7 and, hence, to the concave carried thereby.

As a-sccondary feature of this invention, the concave is arljustablysupported on. the rack bars or movable support therefor, so that saidconcave may be set in dill'erent operative positions in respect to thecylinder. For this urpose a rock shaft 13 is mous'itcd in suitab chearings on the outer end portions of the rack bars 7 and is provided,just inward of the ends of the said rack bars, with crank arms 14, andjust outward of one of said rack bars with an operating crank The crankarms 14 are connected to the outer ends of llat links 15, the inner endsoi which slide .l'rccly on the upper surfaces oi? the rcsJectiVerack'bars 7. Links US are pivotall y connected at their lower ends tothe sliding inner ends of the links 15 and, at their upper ends, theyare pivotally connccted, at 17, to the free end portions oi the concaveend brackets 5.

As is evident, the free or outer end poi-t of the concave will be movedto its hi position when the links 16 are moved vertical positions, and,conversely, the said concave will be lowered by moving the said links 16away from vertical positions. This lOO and. quantities of rain.

adjustment adapts the concave to be set for various kinds of work anddifferent kinds To look the rac bars movements, the shaft 9 is rovidedwith a notched wheel 18 that is a apted to be engaged by a lock dog 19,shown as ivoted to a small bracket 20 on the frame of t e machine case.Likewise, to lock the rock shaft 14 against movement, it is providedwith a notched wheel 21 that is adapted to be engaged by a lock dog 22,pivotallyconnected to the outer end portion of one of the rack bars 7,as best shown in Fig. l.

A transverse rod 23, which is passed throu h the sides of the machinecase, is engagea le with the bearings 6 on the rack ars 7 and serves asa stop to limit the extreme inward movement of the concave. Outward ofand below the concave the rack bars 7 carry guard boards 24 that serveto revent an' outward s lattering of the threshed' rain. The sai boards24 are provided wit suitable clearance passages for the links 15.

As is evident, the mechanism above described afiords extremely sim leand efficient means whereby the toot ed concave may be quickly moved toand from its operative position. When the said concave is moved into theinoperative osition shown in Fig. 1, it is entirely outsi e of themachine case and, hence, is in a position where easy access can be hadthereto for the purpose of repair, adjustment, or any other purpose.Furthermore, when the 4 toothed concave is in operative position, it isfirmly supported so that it will do as good work as if permanentlsecured in position. The device may e readily applied to standardthreshin machines.

What claim is:

1. In a threshing machine, the combina- 7 against endwise cave, su

tion with a toothed cylinder and concave, of a slidable concave supportto which said toothed concave is adjustably connected and which supportis capable of sufficient move ment to carry the entire concave andadjusting connections entirely outside of the machine frame,substantially as described.

2.111 a threshing machine, the combination with a toothed cylinder andconcave, of

a pair of rack bars, a shaft having pinions 811-- gaging said rack bars,and means adjustably supporting said concave from said rack bars,

comprising a rock shaft with crank arms,

links connected to said crank arms with.

their free ends arranged to slide on said rack bars, and linksconnecting the free ends of said first noted links to the free outer endportion of said concave, substantially as described.

3. In a threshing machine, the combination with a toothed cylinder andconcave, of a pair of toothed rack bars to which said concave ispivotally connected at its lower inner end portion, a counter-shaftprovided with an operating'crank and having pinions meshing with saidrack bars, means for locking said counter-shaft against rotation, a rockshaft mounted on said rack bars and provided with an operating crank andwith crank arms, means for locking said rock shaft against oscillation,links connected to said crank arms with their free ends arranged toslide upon said rack bars, and links connecting the free ends of thefirst noted links to the upper outer end portion of said con stantiallas described.

In testimony w ere f I affix my signature in presence of two witnesses.

OLAUS OLSON.

Witnesses: L. D. THAYER, L. O. RAMsTAD.

